A-LevelBiologyInfectious diseasesMay/June 2017Paper 1 Q381 Mark
Smallpox has been eradicated, but malaria and cholera have not. Which statements correctly explain this? 1 Cholera pathogens in the intestines are not destroyed by antibiotics. 2 Plasmodium antigens change during the life cycle. 3 Smallpox antigens remain stable. 4 Vaccines only work against viruses.
A1, 2 and 3
B1, 2 and 4
C1, 3 and 4
D2, 3 and 4
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of infectious diseases within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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